title: Anionic lanthanide complexes with 3-methyl-1-phenyl-4-formylpyrazole-5-one and hydroxonium as counter ion.
abstract: A series of [H3O]+[LnL4]-·nH2O complexes (n= 1-3, Ln = Nd, (1), Sm (2), Eu (3), Tb (4); HL = 3-methyl-1-phenyl-4-formylpyrazole-5-one) were synthesized and characterized. The structures of the SmIIIand EuIIIcomplexes were investigated by X-ray diffraction. The isostructutal crystalls2and3consist the tetrakis [LnL4]-anions which are linked by H-bonding with the hydroxonium counter-ion and water molecules. The lanthanide ion is situated in the center of distorted tetragonal antiprism formed by eight oxygen atoms of 4-formyl-5-hydroxypyrazolonate anions. The TbIIIand SmIIIcomplexes show strong luminescence in solid state, whereas the EuIIIand NdIIIcomplexes show low luminescence activity.
authors.affiliation: Taurida National V.I. Vernadsky University, Simferopol 95007, Ukraine.
authors.forename: Victor F
authors.initials: VF
authors.lastname: Shul'gin
authors.forename: Oleg V
authors.initials: OV
authors.lastname: Konnik
authors.forename: Susana V
authors.initials: SV
authors.lastname: Abkhairova
authors.forename: Alexey N
authors.initials: AN
authors.lastname: Gusev
authors.forename: Svetlana B
authors.initials: SB
authors.lastname: Meshkova
authors.forename: Anna V
authors.initials: AV
authors.lastname: Kiriyak
authors.forename: Eduard B
authors.initials: EB
authors.lastname: Rusanov
authors.forename: Miki
authors.initials: M
authors.lastname: Hasegawa
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Linert
keywords: 4-Formyl-pyrazol-5-one; Crystal structure; Lanthanide complexes; Luminescence